I've been reading Karl Friday's "Legacies of the Sword" and found this following passage which he attributes to Issai Chozan's "Neko no Myojutsu":
The teacher only transmits the technique and illuminates its principle. To acquire its truth is within oneself. [In Zen Buddhism] this is called self-attainment; or it may also be called mind-to-mind transmission or special transmission outside the texts. Learning in this fashion does not subvert the doctrines [of the texts], for even a teacher could not transmit [in that way]. Nor is such learning found only in the study of Zen, for in the meditations of the Confucian sages and in all of the arts, mastery lies in mind-to-mind transmission, special transmission outside the texts. Texts and doctrine merely point to what one already has within oneself but cannot see on one's own. Understanding is not bestowed by the teacher. Teaching is easy; listening to doctrines is also easy; but to find with certainty what is within oneself, to make this one's own, is difficult. [In Zen] this is called seeing one's nature. Enlightenment is an awakening from the dream of delusion; it is the same as understanding. This does not change.
Just thought the above was interesting and resonated, perhaps, with this thread...